Here the files have been unzipped into /opt and the following commands will take you through starting the Oracle installer form that mount point.

[root@centos55 ~]# cd /opt/database

[root@centos55 ~]# ./runInstaller

From this point, Oracle will do a few minor checks on the operating system and then put up the Oracle Installation screen. Our particular configuration did not throw any errors at this point but it should be noted, as it can be helpful, that sometimes the Oracle installer will complain at this very early stage about various Linux system configurations. If this is the case you might be able to bypass them by adding an additional argument to the runInstaller command. Please only use this as a last resort to the normal installation path.

[root@centos55 ~]# ./runInstaller -ignoreSysPrereqs

The installation settings are pretty explanatory. Just go with the defaults, and if there is an error at some point the details panel will explain whats wrong.

At one point you will be asked for the SYSMAN password. Remember it because it will be used to login into the web console.

When you near the very end of the installation, you will be asked to run one or two scripts as root.

Just open up a terminal, su – into root and run the scripts which have their full paths displayed for your convenience.

Execute Configuration scripts

[root@centos55 ~]# /opt/app/oraInventory/orainstRoot.sh

[root@centos55 ~]# /opt/app/oracle/product/11.1.0/db_1/root.sh

1. accept default of /usr/local/bin

2. Click

3. Click

4. Click

Starting And Stoping Oracle

You might need to start oracle back up or stop it at some point so sue these commands which are located in:

/opt/oracle/product/11.2.0/db_1/bin/

emctl start dbconsole

lsnrctl start

dbstart

emctl stop dbconsole

lsnrctl stop

dbstop

Direct NFS Client

For improved NFS performance, Oracle recommend using the Direct NFS Client shipped with Oracle 11g. The direct NFS client looks for NFS details in the following locations:

$ORACLE_HOME/dbs/oranfstab

/etc/oranfstab

/etc/mtab

[root@centos55 ~]# vi $ORACLE_HOME/dbs/oranfstab

server: nas1

path: 192.168.xxx.yyy

export: /vol/u02export mount /u02

Since we already have our NFS mount point details in the "/etc/fstab", and therefore the "/etc/mtab" file also, there is no need to configure any extra connection details.

For the client to work we need to switch the libodm11.so library for the libnfsodm11.so library, as shown below.

SQL>shutdown immediate

[root@centos55 ~]# cd $ORACLE_HOME/lib

[root@centos55 ~]# mv libodm11.so libodm11.so_stub

[root@centos55 ~]# ln -s libnfsodm11.so libodm11.so

SQL>startup

With the configuration complete, you can see the direct NFS client usage via the following views: